Opening Leak Lab

Zukertort Opening: Pirc Invitation

A04 1. Nf3 d6

White scores 52.1% here across 796 club games — but the 15.6% who answer e4 score 41.1%, 11 points worse.

What White actually plays here

Across 796 games from a Lichess-derived book of club play, White scores 52.1% in this position. These are the replies people choose, and how each one works out.

ReplyGamesShare White scoresVerdict
d4 304 38.2% 53.0% holds up
g3 161 20.2% 59.0% holds up
e4 124 15.6% 41.1% below the line
c4 78 9.8% 58.3% holds up
Nc3 39 4.9% 41.0% below the line
d3 30 3.8% 51.7% holds up
b3 25 3.1% 56.0% holds up
e3 25 3.1% 52.0% holds up

"Below the line" means the reply scores at least three points worse than the position does overall. Replies played fewer than 25 times are left out: the sample is too small to read.

Is this costing you anything?

A table of averages cannot tell you whether you go wrong here — only your own games can. Opening Leak Lab reads your Chess.com or Lichess archive, finds the decisions you repeat, and checks each one against this book and a bundled Stockfish.

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